[Tracking Patch] Unified gesture detection

content/browser/renderer_host/input/motion_event_android.h

Index: content/browser/renderer_host/input/motion_event_android.h
diff --git a/content/browser/renderer_host/input/motion_event_android.h b/content/browser/renderer_host/input/motion_event_android.h
index 15cac96ff98938fc8864e5de7cd45b68e211ab0b..88096839f26bce919ab59b65a228bc933223c7a7 100644
--- a/content/browser/renderer_host/input/motion_event_android.h
+++ b/content/browser/renderer_host/input/motion_event_android.h
@@ -10,71 +10,73 @@
 #include "base/android/scoped_java_ref.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/time/time.h"
+#include "ui/events/gesture_detection/motion_event.h"
 
 namespace content {
 
-// Utility wrapper class for Android's android.view.MotionEvent.
-class MotionEventAndroid {
+// Implementation of ui::MotionEvent wrapping a native Android MotionEvent.
+class MotionEventAndroid : public ui::MotionEvent {
  public:
-  // Note: These constants are taken directly from android.view.MotionEvent.
-  //       Do NOT under any circumstances change these values.
-  enum Action {
-    ACTION_DOWN             = 0,
-    ACTION_UP               = 1,
-    ACTION_MOVE             = 2,
-    ACTION_CANCEL           = 3,
-    // Purposefully removed, as there is no analogous action in Chromium.
-    // ACTION_OUTSIDE       = 4,
-    ACTION_POINTER_DOWN     = 5,
-    ACTION_POINTER_UP       = 6
-  };
-
-  explicit MotionEventAndroid(jobject event);
-  ~MotionEventAndroid();
-
-  Action GetActionMasked() const;
-  size_t GetActionIndex() const;
-  size_t GetPointerCount() const;
-  int GetPointerId(size_t pointer_index) const;
+  MotionEventAndroid(JNIEnv* env, jobject event, bool recycle);
+  virtual ~MotionEventAndroid();
+
+  // ui::MotionEvent methods.
+  virtual Action GetAction() const OVERRIDE;
+  virtual int GetActionIndex() const OVERRIDE;
+  virtual size_t GetPointerCount() const OVERRIDE;
+  virtual int GetPointerId(size_t pointer_index) const OVERRIDE;
+  virtual float GetX(size_t pointer_index) const OVERRIDE;
+  virtual float GetY(size_t pointer_index) const OVERRIDE;
+  virtual float GetTouchMajor(size_t pointer_index) const OVERRIDE;
+  virtual base::TimeTicks GetEventTime() const OVERRIDE;
+  virtual size_t GetHistorySize() const OVERRIDE;
+  virtual base::TimeTicks GetHistoricalEventTime(
+      size_t historical_index) const OVERRIDE;
+  virtual float GetHistoricalTouchMajor(
+      size_t pointer_index,
+      size_t historical_index) const OVERRIDE;
+  virtual float GetHistoricalX(
+      size_t pointer_index,
+      size_t historical_index) const OVERRIDE;
+  virtual float GetHistoricalY(
+      size_t pointer_index,
+      size_t historical_index) const OVERRIDE;
+  virtual scoped_ptr<MotionEvent> Clone() const OVERRIDE;
+  virtual scoped_ptr<MotionEvent> Cancel() const OVERRIDE;
+
+  // Additional Android MotionEvent methods.
   float GetPressure() const { return GetPressure(0); }
   float GetPressure(size_t pointer_index) const;
-  float GetX() const { return GetX(0); }
-  float GetY() const { return GetY(0); }
-  float GetX(size_t pointer_index) const;
-  float GetY(size_t pointer_index) const;
-  float GetRawX() const { return GetX(); }
-  float GetRawY() const { return GetY(); }
-  float GetTouchMajor() const { return GetTouchMajor(0); }
-  float GetTouchMajor(size_t pointer_index) const;
   float GetTouchMinor() const { return GetTouchMinor(0); }
   float GetTouchMinor(size_t pointer_index) const;
   float GetOrientation() const;
-  base::TimeTicks GetEventTime() const;
   base::TimeTicks GetDownTime() const;
 
-  size_t GetHistorySize() const;
-  base::TimeTicks GetHistoricalEventTime(size_t historical_index) const;
-  float GetHistoricalTouchMajor(size_t pointer_index,
-                                size_t historical_index) const;
-  float GetHistoricalX(size_t pointer_index, size_t historical_index) const;
-  float GetHistoricalY(size_t pointer_index, size_t historical_index) const;
-
   static bool RegisterMotionEventAndroid(JNIEnv* env);
 
-  static scoped_ptr<MotionEventAndroid> Obtain(const MotionEventAndroid& event);
-  static scoped_ptr<MotionEventAndroid> Obtain(base::TimeTicks down_time,
-                                               base::TimeTicks event_time,
-                                               Action action,
-                                               float x,
-                                               float y);
+  static base::android::ScopedJavaLocalRef<jobject> Obtain(
+      const MotionEventAndroid& event);
+  static base::android::ScopedJavaLocalRef<jobject> Obtain(
+      base::TimeTicks down_time,
+      base::TimeTicks event_time,
+      Action action,
+      float x,
+      float y);
 
  private:
-  MotionEventAndroid(const base::android::ScopedJavaLocalRef<jobject>& event,
-                     bool should_recycle);
+  MotionEventAndroid(const MotionEventAndroid& other, bool clone);
 
   // The Java reference to the underlying MotionEvent.
   base::android::ScopedJavaGlobalRef<jobject> event_;
 
+  base::TimeTicks cached_time_;
+  Action cached_action_;
+  size_t cached_pointer_count_;
+  size_t cached_history_size_;
+  int cached_action_index_;
+  float cached_x_;
+  float cached_y_;
+
   // Whether |event_| should be recycled on destruction. This will only be true
   // for those events generated via |Obtain(...)|.
   bool should_recycle_;